From: Mel Gorman <mgorman@suse.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>,
Valdis Kletnieks <Valdis.Kletnieks@vt.edu>,
Rik van Riel <riel@redhat.com>,
Zlatko Calusic <zcalusic@bitsync.net>,
Johannes Weiner <hannes@cmpxchg.org>,
dormando <dormando@rydia.net>, Michal Hocko <mhocko@suse.cz>,
Jan Kara <jack@suse.cz>, Dave Chinner <david@fromorbit.com>,
Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Linux-FSDevel <linux-fsdevel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>, Mel Gorman <mgorman@suse.de>
Subject: [PATCH 4/8] mm: vmscan: Set zone flags before blocking
Date: Thu, 30 May 2013 00:17:33 +0100 [thread overview]
Message-ID: <1369869457-22570-5-git-send-email-mgorman@suse.de> (raw)
In-Reply-To: <1369869457-22570-1-git-send-email-mgorman@suse.de>
In shrink_page_list a decision may be made to stall and flag a zone
as ZONE_WRITEBACK so that if a large number of unqueued dirty pages are
encountered later then the reclaimer will stall. Set ZONE_WRITEBACK before
potentially going to sleep so it is noticed sooner.
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
mm/vmscan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 5b1a79c..5f80d01 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1445,8 +1445,8 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
*/
if (nr_writeback && nr_writeback >=
(nr_taken >> (DEF_PRIORITY - sc->priority))) {
- wait_iff_congested(zone, BLK_RW_ASYNC, HZ/10);
zone_set_flag(zone, ZONE_WRITEBACK);
+ wait_iff_congested(zone, BLK_RW_ASYNC, HZ/10);
}
/*
--
1.8.1.4
--
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next prev parent reply other threads:[~2013-05-29 23:17 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-29 23:17 [PATCH 0/8] Reduce system disruption due to kswapd followup V3 Mel Gorman
2013-05-29 23:17 ` [PATCH 1/8] mm: vmscan: Block kswapd if it is encountering pages under writeback -fix Mel Gorman
2013-05-29 23:17 ` [PATCH 2/8] mm: vmscan: Stall page reclaim and writeback pages based on dirty/writepage pages encountered Mel Gorman
2013-05-29 23:17 ` [PATCH 3/8] mm: vmscan: Stall page reclaim after a list of pages have been processed Mel Gorman
2013-05-29 23:17 ` Mel Gorman [this message]
2013-05-29 23:17 ` [PATCH 5/8] mm: vmscan: Move direct reclaim wait_iff_congested into shrink_list Mel Gorman
2013-05-29 23:17 ` [PATCH 6/8] mm: vmscan: Treat pages marked for immediate reclaim as zone congestion Mel Gorman
2013-05-29 23:17 ` [PATCH 7/8] mm: vmscan: Take page buffers dirty and locked state into account Mel Gorman
2013-05-29 23:17 ` [PATCH 8/8] fs: nfs: Inform the VM about pages being committed or unstable Mel Gorman
2013-05-30 10:10 ` [PATCH 0/8] Reduce system disruption due to kswapd followup V3 Mel Gorman
2013-07-15 14:21 ` Hush Bensen
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